Small aircraft aircraft landing became uncontrollable, veered off runway.

Attributes
ACN	116810
Time
Date	198907
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : oma
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 52 flight time total : 980 flight time type : 52
ASRS Report	116810
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	other anomaly other anomaly other
Independent Detector	other other : unspecified cockpit
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Small aircraft, IFR, was given clearance for the approach ILS runway 24. Broke out 1800'. Within seconds after touchdown, aircraft was out of control, veered to the right. Stopped in grassy area end of 30R, heavily traffic by large jets. In retrospect, believed to be caused by jet vortices. 'Incident' was inspected by FAA on the spot.

Original NASA ASRS Text

Title: SMA ACFT LNDG BECAME UNCONTROLLABLE, VEERED OFF RWY.

Narrative: SMA, IFR, WAS GIVEN CLRNC FOR THE APCH ILS RWY 24. BROKE OUT 1800'. WITHIN SECONDS AFTER TOUCHDOWN, ACFT WAS OUT OF CONTROL, VEERED TO THE RIGHT. STOPPED IN GRASSY AREA END OF 30R, HEAVILY TFC BY LARGE JETS. IN RETROSPECT, BELIEVED TO BE CAUSED BY JET VORTICES. 'INCIDENT' WAS INSPECTED BY FAA ON THE SPOT.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.